Active-reactive power robust control for distribution network voltage under high-proportion distributed photovoltaic integration

doi:10.3969/j.issn.2097-0706.2026.01.007

Abstract

Abstract:

With the large-scale integration of distributed photovoltaic （PV） systems into distribution networks， voltage fluctuations and out-of-limit issues have become increasingly prominent， and traditional single voltage control methods struggle to achieve rapid dynamic voltage control. Therefore， for distribution networks with high-penetration distributed PV integration， a robust control strategy based on the coordinated operation of distributed power source converters and static var compensators was proposed. Voltage control models for distributed power sources and static var compensators were established. Based on the control models of distributed power sources and static var compensators， a voltage sensitivity matrix was introduced to construct a unified voltage control model for the distribution network. By coordinating active and reactive voltage control， the active voltage regulation capability of the system was fully utilized to achieve rapid dynamic voltage control. Considering the system parameter uncertainties arising during distribution network operation， a robust control strategy was designed incorporating robust H_∞ performance constraints. Based on the IEEE 33-node system， case studies were conducted under scenarios of PV output fluctuations and sudden load changes. The results showed that the proposed strategy achieved rapid and stable voltage control and effectively suppressed voltage fluctuations caused by external disturbances， verifying the rapid response and effectiveness of the proposed control strategy.

Key words: high-penetration photovoltaic, voltage control, robust control, active-reactive power synergy, unified control model

CLC Number:

TK01：TM73

LONG Yu, LIU Xiaofeng, LIU Huai, LIU Guobao, LI Feng, YU Zixiang. Active-reactive power robust control for distribution network voltage under high-proportion distributed photovoltaic integration[J]. Integrated Intelligent Energy, 2026, 48(1): 67-77.

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